1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_GFX_IMAGE_IMAGE_SKIA_REP_H_ 6 #define UI_GFX_IMAGE_IMAGE_SKIA_REP_H_ 7 8 #include "third_party/skia/include/core/SkBitmap.h" 9 #include "ui/gfx/gfx_export.h" 10 #include "ui/gfx/size.h" 11 12 namespace gfx { 13 14 // An ImageSkiaRep represents a bitmap and the scale factor it is intended for. 15 // 0.0f scale is used to indicate that this ImageSkiaRep is used for unscaled 16 // image (the image that only returns 1.0f scale image). 17 class GFX_EXPORT ImageSkiaRep { 18 public: 19 // Create null bitmap. 20 ImageSkiaRep(); 21 ~ImageSkiaRep(); 22 23 // Note: This is for testing purpose only. 24 // Creates a bitmap with kARGB_8888_Config config with given |size| in DIP. 25 // This allocates pixels in the bitmap. It is guaranteed that the data in the 26 // bitmap are initialized but the actual values are undefined. 27 // Specifying 0 scale means the image is for unscaled image. (unscaled() 28 // returns truen, and scale() returns 1.0f;) 29 ImageSkiaRep(const gfx::Size& size, float scale); 30 31 // Creates a bitmap with given scale. 32 // Adds ref to |src|. 33 ImageSkiaRep(const SkBitmap& src, float scale); 34 35 // Returns true if the backing bitmap is null. 36 bool is_null() const { return bitmap_.isNull(); } 37 38 // Get width and height of bitmap in DIP. 39 int GetWidth() const; 40 int GetHeight() const; 41 42 // Get width and height of bitmap in pixels. 43 int pixel_width() const { return bitmap_.width(); } 44 int pixel_height() const { return bitmap_.height(); } 45 Size pixel_size() const { 46 return Size(pixel_width(), pixel_height()); 47 } 48 49 // Retrieves the scale that the bitmap will be painted at. 50 float scale() const { return unscaled() ? 1.0f : scale_; } 51 52 bool unscaled() const { return scale_ == 0.0f; } 53 54 // Mark the image to be used as scaled image. 55 void SetScaled(); 56 57 // Returns backing bitmap. 58 const SkBitmap& sk_bitmap() const { return bitmap_; } 59 60 private: 61 friend class ImageSkia; 62 SkBitmap& mutable_sk_bitmap() { return bitmap_; } 63 64 SkBitmap bitmap_; 65 66 float scale_; 67 }; 68 69 } // namespace gfx 70 71 #endif // UI_GFX_IMAGE_IMAGE_SKIA_REP_H_ 72
